Pressure Indicator Transmitters

Pressure indicator transmitters have a digital indicator for providing a local indication of pressure reading, and a 4-20 milliamp output pressure transmitter for sending an analogue signal to control & monitoring instrumentation.

The built-in digital indicators can be scaled via push buttons or adjustment pots to any pressure unit or a 0-100% full scaling.

No additional external supply is required, since the digital indicator is powered by the 4-20mA current loop from the pressure transmitter.

Contents

Products

DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor - All in one electronic switch, gauge and sensor designed specifically for use in the food, drink and biomedical industry for measuring process pressures.
LEO3 Current or Digital Output Pressure Gauge - LCD digital pressure gauge powered externally by a 2 wire series 4-20mA current loop or a digital interface.

Application Specified Products

10 bar g steam pressure transmitter and indicator - Steam pressure transmitter with LED display indicator for measuring 0 to 10 bars with in-built temperature reducer
3in1 ATEX 10bar pump pressure transducer, gauge & switch - 10 bar three in one pressure transducer / pressure gauge / pressure switch for pump projects with ATEX certification for intrinsic safety.
Hastelloy diaphragm -100 to 50 kPa g range manometer - Small manometer device with membrane protected against corrosive material (chemicals) and which we would prefer to be covered with Hastelloy steel.
10 metre high cylindrical oil tank level gauge and transmitter - Sensor and display for converting a pressure reading to a level reading of a 10 metre high cylindrical oil tank.
Low vacuum leak detection 4-20mA current loop sensor & gauge - Detect low vacuum leaks with this combined 4 to 20 milliamp current output sensor and digital display gauge over a vacuum of 0 to minus 30 inches of water column.
Injection moulding machine 22000 psig 4-20mA output synthetic hydraulic oil pressure sensor - A digital display and high pressure sensor for injection moulding machine use to measure pressure of synthetic hydraulic oil over a range of 0 to 22,000 psi g from the 9/16 UNF female process connection, and sending the corresponding 4-20mA signal through the M12 connector electrical connection.
3inH2O differential 4-20mA nitrogen pressure sensor and display for annealing furnace flow control use - A digital display and pressure sensor for annealing furnace flow control use to measure pressure of nitrogen over a range of 0 to 3 inH2O differential from two 1/8 NPT male process connections, and sending the corresponding 4-20mA signal through the M12 connector electrical connection.
-0.1 to +0.1 inH2O g range 4-20mA signal air pressure sensor and display for pharmaceutical manufacturing use - A positive/negative gauge low range pressure sensor and digital display for pharmaceutical manufacturing use to measure pressure of air over a range of -0.1 to 0.1 inH2O g from the 6mm flexible tubing connection, and sending the corresponding 4-20mA signal through the M12 x 1.5 cable gland and internal screw terminal electrical connection.
16 bar, 200°C steam pressure transmitter and gauge - Combined pressure transmitter and indicator in one package with the option for use with high temperature media such as steam at 200°C
20 MPa g range 4-20mA output high pressure sensor and plug-on display for hydraulic control use - A high pressure sensor and plug-on display for hydraulic control use to measure pressure of mineral hydraulic oil over a range of 0 to 20 MPa g from the G1/8 male process connection, and sending the corresponding 4-20mA current loop signal through the DIN plug connector electrical connection.
Truck loading monitoring using air cushion pressure - Pressure sensor and remote LED display for installing on a truck to monitor air cushion pressure during loading of a vehicle.
Read, transmit and trip Methane gas pressure between 0-160mb g in one device - I am looking for a 4-20mA pressure transmitter device for measuring the pressure of methane (CH4) gas up to 160 mbar gauge.

Product Help

Specifying pressure indicator transmitter features

Indicator type

A pressure indicator transmitter includes a built-in pressure gauge for reading in-situ.

Do you require LCD, backlit LCD, or an LED display?

A display can be configured to display the pressure reading in different pressure units, or as a % full scale, the 4-20mA output, alarm levels, and calibration values.

Output signal

Typically a pressure transmitter with a built-in display indicator will have a 4-20mA 2 wire current loop signal. This 4-20mA signal may include intrinsically safe or flameproof certification for hazardous areas, and HART communications for use in a process plant with other HART enabled devices.

Alarm switch

Since there is a built-in display it is possible to add alarm contact switches on some pressure indicator transmitters which are easily configurable via the display and menu keys.

The contact switches are normally a solid state type such as PNP or NPN, which keeps the size and wiring to a minimum.

Re-calibration

Depending on the product type it is possible to re-calibrate the 4-20mA output signal and the display reading by adjusting the zero and span setting via the display panel menu buttons.

Turn-down ratio

Turn-down the output signal to re-scale the measured range. The turndown ratio defines how low the range can be reduced. A ratio of 3:1 or 4:1 is possible with simpler lower cost transmitters, and increases to 10:1 or 100:1 with more expensive intelligent transmitters.

Will the pressure indicating transmitter need to be moved or re-purposed to measure over a different range?

Checklist for pressure indicator transmitter requirements

Define your pressure indicator transmitter requirements using this checklist:

Indicator type?
Output signal?
Alarm switch?
Re-calibration?
Turn-down ratio?
Pressure range?
Electrical connection?
Process connection?